Human activities are speeding up climate change and global warming in a few big ways:

1. Greenhouse Gas Emissions:

   • When we burn fossil fuels like coal, oil, and natural gas for energy, it creates about 75% of the greenhouse gases around the world.
   • The amount of carbon dioxide (CO2) in the air has gone up a lot. It used to be about 280 parts per million (ppm) before industry began. Now, it's over 420 ppm. That’s more than a 40% increase!

2. Deforestation:

   • Cutting down forests, or deforestation, adds about 10-15% of global greenhouse gas emissions. This happens mainly because we lose places that absorb carbon.
   • Around 10 million hectares of forest get cut down each year. That’s a huge amount of trees!

3. Agriculture:

   • Farming activities create about 24% of global greenhouse gas emissions.
   • One key gas is methane (CH4). This gas is released when cows digest food and also during rice farming. Methane is very powerful; it warms the planet 28 times more than CO2 does over 100 years.

Together, these activities make the greenhouse effect worse. This causes temperatures to go up, leads to extreme weather, and disrupts ecosystems.