Greenhouse gases, such as carbon dioxide (CO2), trap heat from the Sun. This causes the Earth's climate to grow warmer, resulting in "global warming".
Substitution causes sickle-cell anemia.
Answer:
Fossil fuels
explanation: Coal is one type of fossil fuel. This is a nonrenewable energy source whose extraction often damages the environment. Fossil fuels are made from decomposing plants and animals. These fuels are found in the Earth's crust and contain carbon and hydrogen, which can be burned for energy
:)
