What is the physical and chemical evidence that human activity has strongly impacted the climate on earth?

human factors increasing global warming. Burning fossil fuels, eg coal, gas and oil - these release carbon dioxide into the atmosphere. Deforestation - trees absorb carbon dioxide during photosynthesis. ... Agriculture - agricultural practices lead to the release of nitrogen oxides into the atmosphere.

The concentration of CO2 in the Earth’s atmosphere has increased dramatically over the last 150 years, from a pre-industrial era concentration of approximately 280 parts per million (ppm) to more than 410 ppm currently. CO2 concentration levels are unlikely to dip below these annual averages for hundreds of years.

Explanation:

Burning fossil fuels, eg coal, gas and oil - these release carbon dioxide into the atmosphere. Deforestation - trees absorb carbon dioxide during photosynthesis. ... Agriculture - agricultural practices lead to the release of nitrogen oxides into the atmosphere

they are made of gases.

they have a spherical shape.

they make energy through fusion.

it is b that is the answer.