Significant amounts of material from each category were recycled or composted in 2010. The highest recovery rates were achieved in paper and paperboard, yard trim- mings, and metals. We recycled more than 62 percent of the paper and paperboard we generated.
Which of the following has the greatest percent recovery through recycling?
The highest recovery rates were achieved in paper and paperboard, yard trimmings, and metals. Americans recycled more than 64 percent of the paper and paperboard generated. Over 19 million tons of yard trimmings were composted, representing almost a five-fold increase since 1990.
Why does the per capita generation curve level off between 1990 and 2010 quizlet?
Why does the per-capita generation curve level off between 1990 and 2010? The participation in household recycling and composting efforts has expanded.
Which of the following treaty resulted in a dramatic drop in CFCS to reduce the hole in stratospheric ozone?
The Montreal Protocol (and later amendments) was adopted in 1987 — since then all countries have signed on to the agreement, allowing for the dramatic decline in global ozone-depleting emissions. Ozone layer thickness declined, and the Antarctic ozone hole grew substantially from the 1980s through to the early 2000s.
Which of the following is a criteria pollutant responsible for interacting with precipitation to form acid rain?
The main chemicals in air pollution that create acid rain are sulfur dioxide (SO2) and nitrogen oxides (NOX). Acid rain usually forms high in the clouds where SO2 and NOX react with water and oxygen.
What item has the greatest recycling rate?
With an overall recycling rate of 88% in 2012, steel is North America’s most recycled material. More steel is recycled each year than aluminum, paper, glass and plastic combined. Since January 1, 2016, it is estimated that 25,482,452 tons of steel have already been recycled, and this number continues to rise each day5.
Which of the following materials make up the largest percentage of municipal waste?
Paper and paperboard products made up the largest percentage of all the materials in MSW, at 23.1 percent of total generation.
Which source of water makes up 95 percent of the world’s supply of fresh water?
Groundwater accounts for nearly 95 percent of the nation’s fresh water resources. It can stay underground for hundreds of thousands of years, or it can come to the surface and help fill rivers, streams, lakes, ponds, and wetlands. Groundwater can also come to the surface as a spring or be pumped from a well.
How do the rates of land use and gasoline consumption in Australian cities compare with those in US cities?
At any level of per capita land consumption, people in U.S. cities use more gasoline than those in Australian cities. … “The amount of gasoline used by each person generally decreases as per capita land consumption increases.” As urban sprawl increases, automobile use also increases.
What is the largest component of the US municipal solid waste stream?
The figure above shows the breakdown of MSW generation by material. Organic materials such as paper and paperboard, yard trimmings, and food continued to be the largest component of MSW. Paper and paperboard accounted for 23.1 percent, and yard trimmings and food accounted for another 33.7 percent.
What are the most abundant CFCs in the atmosphere?
The most abundant CFCs emitted into the troposphere are CFC 11 and CFC 12. … Atmospheric researchers have determined the rates at which several CFCs react with hydroxyl radicals; the lifetimes for these CFCs with respect to hydroxyl radicals is approximately 80 years.
Where is the bad ozone located how much by percent is here?
Tropospheric “bad” ozone
In the troposphere near the Earth’s surface, the natural concentration of ozone is about 10 parts per billion (0.000001 percent). According to the Environmental Protection Agency, exposure to ozone levels of greater than 70 parts per billion for 8 hours or longer is unhealthy.
What areas are most affected by ozone layer depletion?
The thinning is most pronounced in the polar regions, especially over Antarctica. Ozone depletion is a major environmental problem because it increases the amount of ultraviolet (UV) radiation that reaches Earth’s surface, which increases the rate of skin cancer, eye cataracts, and genetic and immune system damage.
Which of the following causes the greatest amount of ocean pollution?
Most ocean pollution begins on land.
Much of this runoff flows to the sea, carrying with it agricultural fertilizers and pesticides. Eighty percent of pollution to the marine environment comes from the land. One of the biggest sources is called nonpoint source pollution, which occurs as a result of runoff.
Which of the following air pollutant effects plants the most?
3. Which of the following air pollutant effects plants the most? Explanation: Fluorine is the most dangerous air pollutant that affects plant, whereas SO2, PAN and HCl effects the leaf of the plant.
Which of the following is a criteria pollutant responsible?
EPA has established national ambient air quality standards (NAAQS) for six of the most common air pollutants— carbon monoxide, lead, ground-level ozone, particulate matter, nitrogen dioxide, and sulfur dioxide—known as “criteria” air pollutants (or simply “criteria pollutants”).