A warming Earth disturbs weather, people, animals and much more. We see climate change everywhere – in weather patterns, across farmland, throughout plant and animal habitats...

Scientists are documenting the effects of these and other climate-related shifts, which largely stem from global warming caused by humans and are already affecting daily life.

Here, we explore three critical aspects of an increasingly warmer planet...

1. More heat melts ice, worsens weather and expands oceans

Hurricane pushing palm trees
Ninety percent of natural disasters are weather related, the United Nations reports...

These are some high-profile examples of how the extra warmth changes climate conditions and weather patterns:

    • The cryosphere – the frozen water on Earth – is melting. A warmer atmosphere causes the planet's snowpack, glaciers and sea and freshwater ice to melt rapidly. Melting glaciers and polar ice sheets contribute to unprecedented sea level rise. Melting sea ice exposes darker ocean waters, which absorb more sunlight than ice – heating the ocean more and triggering a relentless cycle of melting and heating.


    • Weather is getting more extreme. Heatwaves are more frequent worldwide. The increased evaporation of water is like fuel for storms, exacerbating extreme weather events, such as hurricanes. Rising sea levels make storm surges capable of much greater damage. In more naturally arid areas, droughts and wildfires intensify.


  • The oceans are getting hotter, expanding and becoming more acidic. They are getting hotter because they absorb 90 percent of the extra heat in the climate. This shift causes the oceans to expand, contributing to higher sea levels, and strips corals of their vivid colors. Meanwhile, nearly a third of carbon dioxide emissions end up in the oceans, triggering a chemistry change that makes the water more acidic, dissolving the shells of sea creatures. The ocean is almost 40 percent more acidic than it used to be.
10 climate change solutions within reach...

2. Human life and prosperity suffer as the climate shifts

Woman with ears of corn

Pablo Tosco/Oxfam Aissata Abdoul Diop of Mauritania, in west Africa, shows how corn has dried due to drought.

Our health, economy, livelihoods, infrastructure and much more waver. Consider:

    • Climate change is a major threat to agriculture. Where, how and when we grow food is vitally connected to our climate's normal patterns. Worldwide, farmers are struggling to keep up with shifting weather patterns and increasingly unpredictable water supplies. Farms are more likely to face attacks from weeds, diseases and pests, which reduce yield.


    • Warmer, polluted air affects our health. A warmer atmosphere increases the formation of ground-level ozone – also known as smog – in polluted regions. Smog irritates lungs and triggers asthma attacks. Smoke from wildfires further degrades the air. Extreme summer heat means more deaths during heatwaves. Warmer freshwater makes it easier for disease-causing agents (such as bacteria) to grow and contaminate drinking water.


  • Infrastructure and transportation are at risk. Hot weather, flooding and other extreme weather events damage infrastructure, put heavy burdens on electrical supplies and disrupt how we travel and commute.
Growing more food with less pollution...

3. And natural habitats become hostile to plants and animals

Polar bear on ice

Allan Hopkins/Flickr Climate change is threatening the sea ice where polar bears live...

Habitats on land and in the sea are changing, making them inhospitable for some species, while letting others move in and take over. Some ecosystems are at risk of collapsing.

The changes to the natural world are vast. Here are three well-documented examples:

    • The ice Arctic animals need is vanishing. As sea ice disappears, ice-dependent mammals such as walruses and polar bears struggle to survive. In 2008, the polar bear became the first animal to be added to the Endangered Species Act list of threatened species because of global warming.


    • Coral and shellfish are suffering. Coral reefs are highly sensitive to small changes in ocean temperatures. The heat stresses the algae that nourish the corals and provide their vibrant colors. The algae then leave, and the corals eventually starve – an event known as bleaching. As coral reefs are home to many other species, such as fish, their collapse would disrupt the entire ecosystem. Also, a more acidic ocean affects the normal calcium balance, meaning creatures with calcified shells, such as shellfish and coral, may not have enough calcium to grow.


  • Forests are more prone to deadly infestations. Milder winters and longer summers allow tree-killing insects to thrive. Meanwhile, trees weakened by prolonged drought have lower defense mechanisms. This cycle of warmer weather, weak trees and thriving insects is likely the culprit behind the massive die-off of 70,000 square miles of Rocky Mountain conifers.



original story HERE


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