Final answer:
The best way to reduce human production of greenhouse gases is by switching to the use of electric cars. Other effective approaches include increasing the use of fuel sources that do not produce carbon dioxide and planting more trees.
Step-by-step explanation:
Out of the given options, the best way to reduce human production of greenhouse gases is by switching to the use of electric cars. Electric cars do not produce carbon dioxide as a by-product, unlike cars that run on fossil fuels. By using electric cars, we can significantly reduce our carbon emissions and decrease greenhouse gas levels in the atmosphere.
Another effective approach is increasing the use of fuel sources that do not produce carbon dioxide as a by-product. Renewable energy sources such as solar and wind energy are good alternatives to fossil fuels and can help reduce greenhouse gas emissions.
Planting more trees can also contribute to reducing greenhouse gases. Trees absorb carbon dioxide from the atmosphere during photosynthesis, acting as natural carbon sinks. Therefore, increasing the number of trees can help mitigate the effects of greenhouse gases.