Answer: burning of fossil fuels and deforestation increases carbon dioxide
Step-by-step explanation:
The combustion of fossil fuel such as coal,wood and petrol,releases carbon dioxide into the environment. As the world population rapidly increases, there is an increase reliance on fossil fuel as energy sources.the accumulation of the green house gases (CFC'S, methane,carbon dioxide and nitrous oxide) in the atmosphere causes global warming.
Deforestation also leads to an increase in carbon dioxide as plants are needed to remove the gas from the atmosphere during photosynthesis.
Human activities also cause the washing of detergents and other chemicals into the water bodies, causing excess growth of algae.
When they die,Carbon dioxide is produced.