What do the three R's stand for?
nghĩa là gì và trả lời sao?
K
Khách
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Những câu hỏi liên quan
13 tháng 5 2016
- What do these three Rs stand for ?
3Rs stand for reduce , reuse , recycle.
QT
Quoc Tran Anh Le
Giáo viên
8 tháng 9 2023
1. They often dream about happiness and beautiful lives for the future.
(Họ thường mơ về một tương lai yên bình và hạnh phúc với gia đình của họ.)
2. I want to become a teacher.
(Tôi muốn làm một giáo viên.)
HP
16 tháng 2 2016
1. Môn học yêu thích của bạn là gì?
2. What là... Mik biết bạn đang khiêu khích. Những người biết nghĩa sẽ ko dại gì mà ghi vào đây vì đó chính là hạ thấp bản thân
16 tháng 2 2016
1.môn học yêu thích của bạn là gì
2.what là cái gì
Bạn nguyễn hồng quân ơi câu 1 chữ subject chứ ko phải subjet nha
HQ
Hà Quang Minh
Giáo viên
10 tháng 10 2023
- What do you use a pillow for? - To put my head on when I sleep.
(Bạn dùng gối để làm gì? - Để gối đầu khi ngủ.)
- What do you use a tent for? - To protect me from sunlight or rain when going camping.
(Bạn dùng lều để làm gì? - Để bảo vệ tôi khỏi ánh nắng mặt trời hoặc mưa khi đi cắm trại.)
- What do you use a sleeping bag? - To keep warm when I sleep.
(Bạn dùng túi ngủ để làm gì? - Để giữ ấm khi tôi ngủ.)
- What do you use a towel for? - To dry my body after taking a shower.
(Bạn dùng khăn để làm gì? - Để lau khô người sau khi tắm xong.)
- What do you use a bottled water for? - To ease my thirst.
(Bạn dùng nước đóng chai để làm gì? - Để làm dịu cơn khát của tôi.)
- What do you use a battery? - To provide energy for electric things.
(Bạn sử dụng pin để làm gì? - Để cung cấp năng lượng cho các vật mang điện.)
N
26 tháng 5 2019
1.
Water is uniquely vulnerable to pollution. Known as a “universal solvent,” water is able to dissolve more substances than any other liquid on earth. It’s the reason we have Kool-Aid and brilliant blue waterfalls. It’s also why water is so easily polluted. Toxic substances from farms, towns, and factories readily dissolve into and mix with it, causing water pollution.
Categories of Water PollutionGroundwater
When rain falls and seeps deep into the earth, filling the cracks, crevices, and porous spaces of an aquifer (basically an underground storehouse of water), it becomes groundwater—one of our least visible but most important natural resources. Nearly 40 percent of Americans rely on groundwater, pumped to the earth’s surface, for drinking water. For some folks in rural areas, it’s their only freshwater source. Groundwater gets polluted when contaminants—from pesticides and fertilizers to waste leached from landfills and septic systems—make their way into an aquifer, rendering it unsafe for human use. Ridding groundwater of contaminants can be difficult to impossible, as well as costly. Once polluted, an aquifer may be unusable for decades, or even thousands of years. Groundwater can also spread contamination far from the original polluting source as it seeps into streams, lakes, and oceans.
Surface water
Covering about 70 percent of the earth, surface water is what fills our oceans, lakes, rivers, and all those other blue bits on the world map. Surface water from freshwater sources (that is, from sources other than the ocean) accounts for more than 60 percentof the water delivered to American homes. But a significant pool of that water is in peril. According to the most recent surveys on national water quality from the U.S. Environmental Protection Agency, nearly half of our rivers and streams and more than one-third of our lakes are polluted and unfit for swimming, fishing, and drinking. Nutrient pollution, which includes nitrates and phosphates, is the leading type of contamination in these freshwater sources. While plants and animals need these nutrients to grow, they have become a major pollutant due to farm waste and fertilizer runoff. Municipal and industrial waste discharges contribute their fair share of toxins as well. There’s also all the random junk that industry and individuals dump directly into waterways.
Don't let the Trump administration pollute our drinking water
TAKE ACTION
Ocean water
Eighty percent of ocean pollution (also called marine pollution) originates on land—whether along the coast or far inland. Contaminants such as chemicals, nutrients, and heavy metals are carried from farms, factories, and cities by streams and rivers into our bays and estuaries; from there they travel out to sea. Meanwhile, marine debris—particularly plastic—is blown in by the wind or washed in via storm drains and sewers. Our seas are also sometimes spoiled by oil spills and leaks—big and small—and are consistently soaking up carbon pollution from the air. The ocean absorbs as much as a quarter of man-made carbon emissions.
Point source
When contamination originates from a single source, it’s called point source pollution. Examples include wastewater (also called effluent) discharged legally or illegally by a manufacturer, oil refinery, or wastewater treatment facility, as well as contamination from leaking septic systems, chemical and oil spills, and illegal dumping. The EPA regulates point source pollution by establishing limits on what can be discharged by a facility directly into a body of water. While point source pollution originates from a specific place, it can affect miles of waterways and ocean.
Nonpoint source
Nonpoint source pollution is contamination derived from diffuse sources. These may include agricultural or stormwater runoff or debris blown into waterways from land. Nonpoint source pollution is the leading cause of water pollution in U.S. waters, but it’s difficult to regulate, since there’s no single, identifiable culprit.
Transboundary
It goes without saying that water pollution can’t be contained by a line on a map. Transboundary pollution is the result of contaminated water from one country spilling into the waters of another. Contamination can result from a disaster—like an oil spill—or the slow, downriver creep of industrial, agricultural, or municipal discharge.
NH
4
27 tháng 11 2016
Trả lời như vậy nè:
- No, not at all.
- I don't mean anything.
- I don't know.
3R tượng trưng cho cái gì ? - It is reduce , reuse , recycle.