Define Greenhouse Effect. Does earth need a greenhouse effect to support life? What is currently happening with the greenhouse effect?

The greenhouse effect is the process by which radiation from a planet's atmosphere warms the planet's surface to a temperature above what it would be without this atmosphere. Radiatively active gases in a planet's atmosphere radiate energy in all directions.

Yes earth needs a greenhouse effect to support life .

When the solar radiation falls on the earth's surface, put of the radiation is absorbed and a part is reflected back inte space. Greenhouse gases like carbon diraide and methane present in the atmosphere absorb some of the radiated heat. These trapped radiation further warm the earth The trapping of the sun addition by the gases present in the urthi atmosphere is called greenhouse effect. Without the natural greenhouse effect, life would not have been possible on the carth because in the absence of such an ctfect the cu surface would have been too cold to sustain life.

Many aspects of global climate are changing .High temperature extremes and heavy precipitation events are increasing, glaciers and snow cover are shrinking, and sea ice is retreating. ... Greenhouse gas emissions from human activities will continue to affect Earth's climate for decades

currently due to the use of many vehicles , fossils etc a lot of pollution is caused and concentration of CO2 (carbon dioxide ) has increased which is causing the earth to become to hot which is leading to melting of glaciers which causes global warming .

hope you've understood ☺️

2%? i tried finding the exact sorry if it's not 100% correct ; -;

that would be called plucking : )

explanation:

''plucking, also referred to as quarrying, is a glacial phenomenon that is responsible for the erosion and transportation of individual pieces of bedrock, especially large "joint blocks". as a glacier moves down a valley, friction causes the basal ice of the glacier to melt and infiltrate joints (cracks) in the bedrock."