Explain two changes caused by nature
Answers
Two changes caused by nature are:-
Agricultural land loss and soil erosion :-
Soil erosion is a naturally occurring process that affects all landforms. In agriculture, soil erosion refers to the wearing away of a field's topsoil by the natural physical forces of water and wind or through forces associated with farming activities such as tillage.
Erosion, whether it is by water, wind or tillage, involves three distinct actions – soil detachment, movement and deposition. Topsoil, which is high in organic matter, fertility and soil life, is relocated elsewhere "on-site" where it builds up over time or is carried "off-site" where it fills in drainage channels. Soil erosion reduces cropland productivity and contributes to the pollution of adjacent watercourses, wetlands and lakes.
Natural Disasters causes Environmental Changes
Natural disasters can cause drastic environmental changes and if severe enough, even mass extinctions. The environment is comprised of the surroundings and conditions where a person, animal or plant thrives. Natural disasters have been occurring since the formation of Earth 4.6 billion years ago. The mass extinction of dinosaurs is thought to be the result of a large asteroid impact and possibly increased volcanism approximately 65 million years ago that caused catastrophic environmental damage from global forest fires, blocking out the sun and increased levels of carbon dioxide in the atmosphere. By examining previous natural disasters and their environmental impacts we can learn what to expect in the future.