Give four human activities that contribute to global warming.

1. Burning fossil fuels for transportation and electricity generation
2. Deforestation and land use changes, such as clearing forests for agriculture or urban development
3. Industrial processes, such as manufacturing and mining, that release greenhouse gases
4. Agriculture practices, such as livestock production and rice cultivation, that release methane and nitrous oxide into the atmosphere.

1. Burning fossil fuels: The combustion of fossil fuels, such as coal, oil, and natural gas, releases greenhouse gases into the atmosphere, primarily carbon dioxide (CO2).
2. Deforestation: The clearing of forests, particularly in tropical regions, reduces the Earth's ability to absorb CO2 through photosynthesis and leads to increased atmospheric greenhouse gas levels.
3. Industrial processes: Certain industrial activities, such as cement and steel production, release significant amounts of CO2 and other greenhouse gases as a byproduct of manufacturing.
4. Agriculture: Agricultural practices like livestock farming and the use of nitrogen fertilizers contribute to the release of methane (CH4) and nitrous oxide (N2O), potent greenhouse gases that have a significant impact on global warming.