Pollution happens when trash, chemicals, or other substances contaminate the Earth's air, water, or land. Learn how to define pollution, explore facts on how it hurts people and animals, and discover how to stop it. What Is Pollution? Pollution is anything that makes the earth dirty and ...
thesecondtheorythatcholera 3 (cause)byaninfectionfromgermsinfoodorwater.Itwas correct,butabundant 4 (prove)wasstillneeded.Hewasdeterminedtofindoutwhy. Snowbeganby 5 (mark)onamaptheexactplaces 6 allthosewhodiedhadlived. Snowdoubtedifthewaterpumpwas 7 (blame).Atlast,hewasabletoannouncethatthe pumpwa...
glassofwaterbeforeyougotobed. 6 But haveyoueverwonderedifitisstillsafetodrink? “Ifyouhaveclean waterinacleanglass, you?refinetodrinkitforadayortwo,”Kellogg SchwabfromtheJohnsHopkinsUniversity WaterInstituteintheUStoldTime. 7 That?sbecauseafterabout12hours, thecarbondioxide (二氧化碳)intheairreacts (...
Dongting Lake is the second freshwater(淡水) lake in China, it’s home to nearly 400 kinds of fishes. But in the past, people threw litter and factories put waste water into the lake. Even worse, a large number of fish were caught by fishermen. Because of pollution and overfishing (过...
5 For example, there are disagreements about how much to control fishing or pollution. Now the agreement has a long way to go, which must be officially accepted at a UN meeting and be supported by enough countries before it works. A.But the oceans are in trouble. B.And it’s a great...
• See how pollution and human activity are harming sea life. • With real videos of marine animals. • Suitable for all ages from 3+. ABOUT LEARNY LAND At Learny Land, we love to play, and we believe that games must form part of the educational and growth stage of all children;...
经典范文:In my point of view, all of us should save water. People can't live without water. But the real situation is that the shortage of water is becoming a serious problem in many parts of the world due to growing population and the pollution of the rivers and lakes. ...
Protect our enviorment The earth is our home,we must take care of it.We shoule make a less pollution as we know everybody in north America makes 1000 kilograms of the garbage everyday. Most of it is packaging Most of garbage turns into soil but not to plastic,plastic keeps for many ...
it helps to reduce the traffic pressure. There will be less pollution because of bike-sharing. Besides, bike-sharing helps people take more exercise. In this way, it's helpful to people's health. As for me, I'd love to have a brother or siste...
(2) Learning and Memory finds you are probably better off sleeping than making last-minute preparations for a test. Two hundred college kids were taught to play some unfamiliar video games. Subjects who learned the games in the morning lost some skills when they played again 12 hours later, ...