Almost all of the 300 large glaciers worldwide are shrinking, according to a study published in Geophysical Research letters. Many believe it is due to the global warming, which can be defined as the increase of earth’s average surface temperature due to the emission of greenhouse gases such as carbon dioxide from burning fossil fuels or from deforestation, which trap heat that would otherwise escape from Earth. It is known as the greenhouse effect.
Water Scarcity, Flood and Drought
By 2025, two-thirds of world’s population may face water scarcity. water covers 70 percent of our planet, but the fresh water the stuff we drink, bathe in, irrigate our farms and fields with- is very rare and it is only 3 percent of world’s water. And two third of that fresh water is tucked away in frozen glaciers. Today nearly one billion people in the developing world don’t have access to fresh water.
Water is the foundation of our lives and its scarcity will affect health, development etc. They are exposed to diseases such as cholera, typhoid fever and other water-borne diseases. As a result of human activities, more than half of the world’s wetlands have disappeared. Population explosion, global warming, deforestation are imposing more stress to the remaining water resources. Human activities are the only reason behind droughts in some areas and floods in others. It’s sure ecosystems around the world will suffer even more. in India we are facing a steep decrease in ground water level and now we are promoting rainwater harvesting and fixation.
First you should have a little knowledge about the physics behind Natural hazards such as Earth quack, tsunami etc. Natural hazards occur when Earth try to rearrange itself to minimize the stress on it, Right? According to Wikipedia, Hazard is a naturally occurring event that might have a negative impact on people or the environment. Such natural hazards become natural disasters when people’s lives and livelihoods are destroyed. Most common natural hazards are Tsunami, cyclone, Earthquake, flood, volcanic explosions etc.
Sea level Rise and Land Loss
Most recent measurements tell us that over the past century the Global Mean Sea Level has risen by 4 to 8 inches. Over the past century, the burning of fossil fuels and other human and natural activities has released an enormous amount of greenhouse gases into the atmosphere. These emissions have caused the earth’s surface temperature to rise, and the ocean absorb about 80 percent of this additional heat. Now see how heat absorption caused sea level rise.
1. Thermal expansion
2. Melting of Glaciers and polar Ice caps
3. Ice loss from Greenland and WestAntartica
As sea water reaches farther inland, it can cause destructive erosion, flooding of wetlands, contamination of qualifiers and agricultural soils, and lost habitat for fish, birds and plants. Here is a Latest Example for sea level rise ‘The ocean is eating away our island’ Kivalina, Alaska
Food Scarcity and poisoning
As a result of the water shortage for irrigation, we are going to face food scarcity in future. A shortage of food may happen when not enough food is produced, such as when crops fail due to drought, pests etc. Increasing population and dwindling resources are fuelling food scarcity. In such a situation, food consumption in the insecure environment will lead to food Poisoning.
Let us Know more Environmental threats in Comment Section
- Infectious Diseases Shared by Aromal Karuvath