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Yes, the climate actually has changed before. The climate has changed in the past due to natural fluctuations of CO2 in the atmosphere, but what we are witnessing now is not natural, and is instead man-made.

Humans today are emitting exponential quantities of CO2 and methane, at a rate much faster than seen anywhere in earth鈥檚 history.

in Earth鈥檚 temperature are due to rapid increases in greenhouse gas emissions, similar to what is happening today. The difference is that in the past, the earth had millions of years to adjust to these jumps in atmospheric CO2. The intense, modern emissions of CO2 caused by recent human industry has happened in mere the decades since the Industrial Revolution.

• In addition, past abrupt changes in temperature or global warming have resulted in mass extinctions. Comparatively, scientists have observed a compared to expected rates in modern years. Many scientists now believe we are in the midst of the sixth mass extinction of earth鈥檚 history.
  
• What can we learn from these past mass extinction events? The Earth survives, but the species who live on it do not. Humans are, very likely, not an exception to this rule.

The effects of such a drastic increase in atmospheric methane and carbon emissions are rising sea levels due to glacial melt, ocean acidification, and warmer global average temperatures.

First of all, a consensus in science is much different than a consensus in politics. Scientists reach a consensus based on evidence. A consistent weight of evidence over time forms the basis of a scientific consensus.

When experts in climate science are polled, that climate change is happening, that it is human caused, and that it could prove to be deadly if we do not intervene.

Long term changes and trends of glacier activity show worldwide, proving the basis of the Global Glacier Recession.

During the 2009/10 winter, the northeast saw record breaking snowstorms. In Philly, citizens experienced two 100-year snowstorms, nicknamed . When the entire year鈥檚 average temperatures were reviewed, 2009 was the second hottest year on record at the time, and January 2010 was the hottest January on record at the time. So why are we seeing big snow storms?

As the climate warms, evaporation from the oceans increases. This gives way to more water vapor in the atmosphere. Water vapor has increased over 5% in the 20th century alone. The extra water vapor has to go somewhere, leading to extreme precipitation events that can occur in the summer or winter.

Weather is not climate. You cannot look at one storm event and claim it proves or disproves climate change! It is the pattern of storm intensity that proves climate change is happening.
 

, not because of computer model projections, but because of physical evidence, such as consistently warmer-than-average surface temperatures.

Storms are not caused by global warming, but have greater intensity due to a warmer climate.

As our , there is an increase in thermal energy storms can feed off of. Tropical storms and hurricanes, for example, feed off of thermal energy from warming oceans. This is why hurricane season lasts from August to early November, when the Atlantic Ocean is at its warmest.

• Expect storms to have higher wind speeds, cause more destruction, last longer, and make landfall more frequently due to the increased energy taken from warmer-than-average oceans.

On average, there about 90 tropical storms per year, and frequency has not been linked to climate change.

They don鈥檛 have to. has decreased their greenhouse gas emissions by more than 6%, while showing a faster economic growth than the rest of Canada. How? British Columbia has imposed a carbon tax on corporations.

Multiple countries and states around the world have instituted a carbon tax to cover the cost that carbon emissions have on society. Carbon emissions are an externality, meaning they have a negative impact on people who are not responsible for their production. A carbon price allows municipalities to help those who are most severely impacted by the effects of carbon pollution and climate change, and encourages polluters to find new ways of operating that do not result in high emission rates.

British Columbia, Canada instituted a carbon tax in 2008, and between 2008 and 2011:

• British Columbia鈥檚 per capita emissions of CO2 and other taxed Greenhouse Gas (GHG) declined.
• Emissions per capita was 9.2% below the national average.
• Emissions per Gross Domestic Product (GDP) was 12.4% below the national average.
• Overall emissions have decreased by 6.1%, while the rest of Canada has increased by 3.5%.
• British Columbia鈥檚 GDP growth slightly outweighed the rest of Canada
• The revenue from the tax has been used to fund more than $1 billion worth of cuts in business and individual taxes, annually. Tax credits protect low-income households who might not benefit from the tax.
• British Columbia elected officials who implemented the tax have been voted back into office twice.
  

Now the rest of Canada will follow British Columbia鈥檚 lead. announced in October that each providence will have 鈥渦ntil 2018 to adopt a carbon price scheme, or the federal government will step in and impose a price for them鈥�.

One could argue that not responding to climate change will destroy our economy. The US government has experienced an increase in spending directed toward natural disaster relief.

Between 1980 and 2017, , the cost of which exceeds $1.2 trillion (these numbers do not include the most recent natural disasters: hurricanes Harvey, Irma, and Maria). So far, 2017 has seen 15 weather and climate disasters that exceeded $1 billion, matching only 2011 for the highest number of billion dollar disasters.

There is now concern that not responding to climate change will threaten our right to property.

are adjusting their range of coverage and who they are willing to cover. It is unsure how large of a disaster insurance companies are able to survive. In 2005, $50 billion was paid in disaster-related insurance claims, compared to $10 billion in claims a decade earlier.

Insurance companies have dramatically raised homeowners鈥� annual premiums, especially in coastal states such as Texas, Louisiana, the Carolinas, Massachusetts, Florida and New York.

In South Carolina, private insurance companies have stopped insuring homes that value less than $500,000.

In Rhode Island, some agencies outright refuse to cover coastal properties.

Even before Super Storm Sandy, Allstate Insurance Co. elected to NOT renew 30,000 policies covering coastal regions in NYC, Long Island, Westchester County, and Connecticut.

These are all signs that insurance companies are starting to see climate change as a risk to their bottom line.
 

History shows that the transition to renewable energy has resulted in a  

The Department of Energy, in their 2017 U.S. Energy and Employment Report, stated that jobs provided by clean energy companies are driving the country鈥檚 economy. Those clean electricity jobs out-employ the fossil fuel industry by 5 to 1, putting money in the pockets of more American workers.

• Nearly 1 million American鈥檚 are working near or full-time in energy efficiency, solar, wind, and alternative vehicles sectors (5x the employment than fossil fuel jobs).
• The green economy has been growing, according to the Environmental Defense Fund, a recent report found that more than 4 million sustainability jobs can be found in the U.S, up from 3.4 million in 2011.

While no one likes change, there is hope that a sustainable future will encourage efficient consumption and technology improvements will upgrade the products we use, causing them to be less harmful on the environment and society.

On the topic of motor vehicles:

Trucks are a staple of the American economy and culture. Popular truck manufactures have identified new ways of making their vehicles more energy efficient while still providing the power and performance consumers expect. The ford F-150 with aluminum body and EcoBoost has been a leader in the high performing truck market.

Tesla has proven that electric cars don鈥檛 have to be just a commuter car, but a real luxury sports vehicle. The newest is the third fastest car on the market, just behind the Farrari LaFerrari and the Porsche 918 Spyder.

What happens with the share economy, driverless cars, and companies like Uber and Lyft? The future is unknown, but there may be a natural transition away from personally owned vehicles that provides society with the comfort and convenience they want and expect.

You should care about climate change because it will affect you, and probably already has. The has named climate change as the greatest threat to global health in the 21st Century.

In the Mid-Atlantic and New England states, , as a result of the pathogens carried by some mosquitoes, ticks, and fleas. You may already know someone who has been effected by Lyme disease or West Nile virus.

Across the country, cities and states have experienced extreme flooding. Houston, Texas, southwestern Florida, Puerto Rico, and the US Virgin Islands are recent examples of destructive flooding brought on by the 2017 hurricane season alone. Additionally, Kentucky, Arizona, the Great Lakes, Arkansas, Missouri, Indiana, Tennessee, Washington, Utah, Idaho, California, and Alabama also experienced some form of extreme flooding.

Miami deals with flood risks on a daily basis, and will to raise up their streets to reduce flooding at high tide.

With the increase in flooding around the country comes an increased risk of water-borne illnesses caused by pathogens (bacteria, viruses, protozoa), algae and/or cyanobacteria contamination.

Climate change has also affected America鈥檚 food supply. Extreme weather events, which includes warm winter months, extreme summer heat, excessive rain, and drought, affect our nation鈥檚 crops. This has resulted in spoilage, low crop yields, inefficient utilization of land, and interruption in disruption of food distribution.

The claim that increased CO2 in the atmosphere will increase food production because plants need CO2 to grow is false. Plants do need CO2, but like chocolate, too much of a good thing can be bad. that the projected increase in CO2 concentrations will result in lower levels of nutrition from the same food we eat today, requiring more food production for the same nutritional value.