As Earth's population hits seven billion in 2011, the percentage of people with a decent standard of living is higher than it has ever been. Inequality still abounds: Two percent of the population owns 50 percent of the wealth. But the gap between the world's poorest and richest is now filled by a broad middle-income group that scarcely existed on a global scale 50 years ago. More children live to be adults, and fewer adults die of preventable diseases. The birthrate is falling. Yet before the era of explosive population growth ends by 2050, Earth will hold more than nine billion people. The challenge: How to share and sustain the planet while lifting even more people into a better life.
Quick summary of some major issues:
* An area of frozen methane lakes in Siberia greater than the land area of the USA. Current temperature of about -15 degrees, warmed by 3 degrees over the last ten years. Methane is ~24x more powerful as a greenhouse gas than carbon dioxide. Assuming a current trend, that's about 50 years off being released.
* Amplified carbon output by industry and transport, contributing to the problem.
* Acidification of the oceans. The pH of the sea has been decreasing due to the increase of CO2 in the atmosphere. CO2 is absorbed by the sea and makes it more acidic.
* Deforestation in biodiversity hotspots reducing nature's carbon fixing capacity.
* Global overfishing by around 157%. Major decline in high trophic level predators will precipitate unpredictable, but probably unfavourable changes in marine biodiversity. Also going to result in over a billion people starving. This might actually help the overpopulation problem in this regard.
* The squandering of water resources, more and more water is becoming undrinkable. Only ~2.6% of the water on Earth is fresh water, and 77% of that is trapped in ice, 22% in groundwater, and the remaining 1% in lakes, rivers, and the biosphere. That 1% is becoming polluted to shit, and used up for stupid crap like consumer products and unsustainable production of almost everything.
* Mismanagement of land all over the place resulting in soil erosion, an irreplaceable resource given the time it takes for soils to form.
These are some of the main issues I can think of offhand, there are undoubtedly more to talk about. Without being alarmist, these things are actually happening, and there is plenty of science highlighting these problems, and yet there seems to be very little effort overall to address these problems and change.
Not only this, but an overwhelming majority of people are either ignorant of what's happening, don't understand the issues to any degree enough to be concerned, or even worse, don't even give a shit. It's life as usual for most. They still want their massive TV and lame consumer shit. We're all guilty of it.
The worse part is how our politicians know about some of these issues but are forced into caring or advocating short sighted irrelevant issues like Islamic militant terrorism, which only makes up
0.34% of all terror attacks in Europe, or if Obama was born in the US or not.
I think we're headed into a massive disaster, and it's about time these issues got the proper acknowledgement they deserve rather than sitting in the back of our minds with the "oh it's not an immediate problem now so it's sweet for the time being" mentality. We need to be heading into a post-consumption society. It is
US now who could become the most important generation in human history in our brief existence.