Acid Rain What is acid rain Acid Rain is any type of precipitation with acidic components that falls to the ground from the atmosphere. It can be wet or dry. These compounds can be carried away by air currents for hundreds of miles. They fall back to earth in the form of rain, sleet, hail, snow and dust.
Half of the world's wetlands were lost last century. Logging and conversion have shrunk the world's forests by as much as half. Some 9 percent of the world's tree species are at risk of extinction; tropical deforestation may exceedsquare kilometers per year.
Fishing fleets are 40 percent larger than the ocean can sustain. Nearly 70 percent of the world's major marine fish stocks are overfished or are being fished at their biological limit. Soil degradation has affected two-thirds of the world's agricultural lands in the last 50 years.
Some 30 percent of the world's original forests have been converted to agriculture. Sincethe global economy has tripled in size and population has grown by 30 percent to 6 billion people.
Dams, diversions or canals fragment almost 60 percent of the world's largest rivers. Twenty percent of the world's freshwater fish are extinct, threatened or endangered.
People and Ecosystems, the Fraying Web of Life United Nations Development Programme A pioneering analysis of the world's ecosystems reveals a widespread decline in the condition of the world's ecosystems due to increasing resource demands.
The analsysis, by the World Resources Institute WRI warns that if the decline continues it could have devastating implications for human development and the welfare of all species.
The analysis examined coastal, forest, grassland, and freshwater and agricultural ecosystems. The health of the each ecosystem was measured, as based on its ability to produce the goods and services that the world currently relies on.
The analysis shows that there are considerable signs that the capacity of Earth's ecosystems to produce many of the goods and services we depend on is rapidly declining. To make matters worse, as our ecosystems decline, we are also racing against time since scientists lack baseline knowledge needed to properly determine the conditions of such systems.
New Analysis of World's Ecosystems Reveals Widespread Decline ENN Will our great- grandchildren inherit a desiccated husk of a once shimmering planet, and curse us for a legacy of droughts, plagues,storms and hardscrabble moonscapes?
The four-fold increase in humans and the advent of the consumer society - have made the end of the millennium a cusp of history. Affluent consumers in Hong Kong want exotic fish and presto! Poachers in the Philippines destroy vital reefs to meet that demand.
Millions of workers in China and Russia are plagued with pollution-related ailments. We need your help to ask President Barack Obama and the Environmental Protection Agency to get working on a bold plan to curb ocean acidification.
Carbon dioxide pollution is also being absorbed by the ocean, causing its chemistry to change and become more acidic.
This spells trouble for marine animals that are now having difficulty building shells, growing and sometimes even surviving in increasingly corrosive waters. Damian Carrington Seafood is the critical source of protein for more than 2. Official catch data from FAO rarely includes small-scale, sport or illegal fishing and does not count fish discarded at sea.
A more exhaustive study, taking over a decade shows that the annual catches between and were much bigger than thought, but that the decline after the peak year of was much faster than official figures.
The new research estimates the peak catch was million tons, but declined at 1. Prof Daniel Pauly, at the University of British Columbia in Canada and who led the work, said the decline is very strong and "is due to countries having fished too much and having exhausted one fishery after another.
While the results necessarily remain uncertain, they undoubtedly represent our most complete picture yet of the global state of fish catches.
But afterfew undiscovered fisheries were left and catches started to decline. The decline since has largely been in fish caught by industrial fleets and to a lesser extent a cut in the number of unwanted fish discarded at sea.This page is being updated.
Thank you for your interest in this topic. We are currently updating our website to reflect EPA's priorities under the leadership of President Trump and Administrator Pruitt. Normal rain water is slightly acidic with a pH range of , because carbon dioxide and water present in the air react together to form carbonic acid, which is a weak acid.
When the pH level of rain water falls below this range, it becomes acid rain. Watch the Macy's Thanksgiving Day Parade, Live. Get a degree view of the floats, balloons and performances, live from New York City. View from the battlements of Fort Ticonderoga on Lake Champlain in New York state showing cannon, mortars, the lake, and Mount Defiance.
The fort controlled a river portage between Lake Champlain and Lake George and then to the Hudson River. Latest environmental news, features and updates. Pictures, video and more. Significant Energy E vents in Earth's and Life's History as of Energy Event.
Timeframe. Significance. Nuclear fusion begins in the Sun. c. billion years ago (“bya”) Provides the power for all of Earth's geophysical, geochemical, and ecological systems, with .