Whenever squidward laughs, his olfactory organ shrivels up. what is it?

The olfactory organ is Squidward's nose. The nose is called an olfactory organ because it is responsible for olfaction (from Latin word olfactus which means "to smell"). The exact mechanism why Squidward's nose shrivels up while laughing is physiologically unexplainable. 

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