Why do people panic buy?

Uncertainty. They don't want to come up short in an emergency.

all Eco-friendly products since planet Earth is getting destroyed by Global Warming

the culture of selfishness

It's a normal thing to do in a bad situation. When the pandemic hit. The media made us think it was the end of the world. Running water would stop. Gas would be rationed. Food would be all but gone. So the people who listen to these morons on the local news went out and cleared the shelves of toilet paper, canned foods, bottled water. 

well regarding covid, i suppose they do incase they get ill  and want food etc  and in case of floods  they need to get food  to last incase they are cut off  from shops 

Smart people don't.

Cause we panic! We're afraid we will run out of important stuff like food, toilet paper, cleaning products.

Yeah I think it's silly. I buy what makes me happy not out of fear

A nuclear war is just around the corner.

People are panicking! People are worried! 

because the average person is a moron