Evidence suggests that earth climate is warming. Which activity do scientists believe contributes most to global warming?
The release of greenhouse gases from fossil fuels.
Anthropogenic climate change is largely caused by the release of GHG's from burning coal, oil, and natural gas (mostly the first two).
Factories and power plants burn coal and oil, gasoline for cars is derived from oil, and much of the US's electricity and heating comes from natural gas.
Much of the methane we release is from agriculture due to our raising of about 1.5 billion cows, and 770 million pigs. Natural gas also releases methane when fracking for it, since 4% of the extracted material is methane that escapes into the atmosphere.
These are the main sources, but the activity that contributes most is burning fossil fuels, which releases