Environmental issues - causes and effect

[Laurentine]

In this topic we are going to discuss the environmental issues and its causes and effects. Name an issue, for instance I will begin with the global warming, and name its causes and negative or positive (if there exist so) effects on the environment and people. Also you can number the possibilities of solving the problem.

[Laurentine]

What causes global warming?
Scientists have determined that a number of human activities are contributing to global warming by adding excessive amounts of greenhouse gases to the atmosphere. Greenhouse gases such as carbon dioxide accumulate in the atmosphere and trap heat that normally would exit into outer space.
The Consequences of Global Warming
As the concentration of greenhouse gases grows, more heat is trapped in the atmosphere and less escapes back into space. This increase in trapped heat changes the climate and alters weather patterns, which may hasten species extinction, influence the length of seasons, cause coastal flooding, and lead to more frequent and severe storms.

[Benn]

Loss of Biodiversity and Extinctions.
It is feared that human activity is causing massive extinctions. From various animal species, forests and the ecosystems that forests support, marine life. The costs associated with deteriorating or vanishing ecosystems will be high. However, sustainable development and consumption would help avert ecological problems.
Humanity's impact on the earth has increased extinction rates to levels rivaling the five mass extinctions of past geologic history, transformed nearly half of Earth’s land and created 50 dead zones in the world’s oceans, according to research being presented this week at the 16th International Botanical Congress.
The solution is not to litter water...

[Peach]

Another great problem is overpopulation and it can be hardly solved.
Many of us have grown up learning and being told that 6 billion is too much and this "over population" is primarily impacting the planet's ability to cope. But is that really the case? Sure, the planet is facing incredible stress.
Studies point to ecological limits to sustain people, but these limits can be different, based on the way we consume resources etc so it is hard to say for sure what over population means let alone if we are at some threshold, below, or above it.

[Riser]

One of the most important problems on the globe is poverty.
Poverty is the state for the majority of the world’s people and nations. Why is this? Is it enough to blame poor people for their own predicament? Have they been lazy, made poor decisions, and been solely responsible for their plight? What about their governments? Have they pursued policies that actually harm successful development? Such causes of poverty and inequality are no doubt real. But deeper and more global causes of poverty are often less discussed.

Behind the increasing interconnectedness promised by globalization are global decisions, policies, and practices. These are typically influenced, driven, or formulated by the rich and powerful. These can be leaders of rich countries or other global actors such as multinational corporations, institutions, and influential people.

[Terry]

An unacceptable number of species are still being lost forever despite world leaders pledging action to reverse the trend, a report has warned.

The International Union for the Conservation of Nature (IUCN) says the commitment to reduce biodiversity loss by 2010 will not be met.

It warns that a third of amphibians, a quarter of mammals and one-in-eight birds are threatened with extinction.

[Kieth]

Global warming makes the temperature of the earth warmer what does it leads to?
- Ice melting, the water level will rise, lesser land, land price go up, scientist will come up something to life on water or under. It would deffently change the economy, like some island as HongKong a big economy will go down will change a lot of things.

- Warmer earth means the seawater will vaporize more, that means there will be more heavy long storms. While some places will have heavy storms, some places will never have storm and the land will try up. As some places will dry up and plants die, the desert will spread. Deserts are like a plage the only way to stop it is having planting plants, trees and the like (i’m not so sure about the desert stuff, you should check it out), forest fire will go up

- Some river comes from constant melting of ice on mountains, as on point 1, those ice melt and rivers will dry up, some transport that rely on rivers will go down, some tribes that rely on those rivers have to move, … (i’m stuck here)

- Some animal cant stand the sudden temperature change and will die out, or animals that live on those ice places like the polar bear. As some animals will die out the chain of nature will be broken, some animal that rely on those animal for food will die out to.

- as the land will be drying there will be more earthquake because drying up the land will make it easyer to crack.

- Global warming is caused by burning fuel and creates CO2 this is also what happend before the iceage, before iceage… volcano’s put CO2 in the air, but in a longer periode, so that animals could adobt it, but now we dug up those fuel back up and firing all those back in the air in just 100 year.
Global Warming Survival Center

[jeofjingjeff]

Concern about rising temperatures has been growing in recent years as atmospheric
scientists report rising temperatures associated with greenhouse gases released into
the air by industrial and other human processes.


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