How is climate change effecting the great barrier reef?

Its a mix of multiple things! coral bleaching and human impact, the plans for development on the area and the higher tourist rates, theres also a mining plan in which will negatively impact it as the mine will be placed on the outskirts of the great barrier reef, therefore the emissions from the coal mine will waft up in to the ocean affecting the micro organisms and other life within.

Humans can affect weathering and erosion in several ways.  humans cause  increases in acid rain and pollution, which increase the amount of  weathering  agents in the air and water, and then on land.for an easy answer: 1) acid rain2) pollution