Using too much solar power
Planting too many trees
Where heat is kept out of the atmosphere
Where heat is retained in the atmosphere
Where more light is let into the atmosphere
Where less light is let into the atmosphere
More islands forming
Sea level rise
More volcanic eruptions
They cause more heat to be kept out of the Earth.
They cause the sun's light to be kept out of the Earth
They absorb and hold in heat.
They cause acid rain.
Glaciers to get smaller
Glaciers to grow
Volcanoes to erupt