Why do we have pollution?

Explanation:

We have air pollution because we use electricity fuel in cars that creates smoke and is released in the air.

Cows make methane which also pollutes the world

People litter when they eat food. E.g a person would throw their packet of crisps on the floor rather than throwing it in the bin

≅200-130 milions years ago pangea splited in 2 continents

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.