3.other recent advances include"thin film"photovoltaic technology,a high-tech coating that converts any surface covered with the film into a solar-electric power source
1.the UN-backed Millennium Ecosystem Assessment Synthesis Report found that nearly two-thirds of Earth’s life –supporting ecosystems,including clean water,pure air,and stable climate are being degraded by unsustainable us.
2.Achieving this,however,will require radical changes in the way nature is treated at every level of decision –making and new ways of cooperation between government,business and civil society.
4.with the costs of green roofs are one-and-a-half to twice to that of conventional roofs,advocates say green roofs make long-term economic sense,even without factoring in energy savings.
5.as people find more ways to incorporate these inexpensive,flexible and infinitely customizable devices into their lives,the computers themselves will gradually”disappear”into the fabric of our lives.
6.the human race has methodically improved crop plants through selective breeding for many thousand years,but genetic engineering allows that time-consuming process to be accelerated and exotic traits from unrelated species to be introduced.
7.supporters of GM technology argue that engineered crops-such as vitamin A-boosted golden rice or protein –enhanced potatoes-can improve nutrition,that drought or salt-resistant varieties can flourish in poor conditions and stave off world hunger,and insect-repelling crops protect the environment by minimizing pesticide use.
8.The Food and Drug Administration,along with the National Institutes of Health,launched several investigations of the University of Pennsylvania studies and others.
9.Scientists,however,have discounted the benefit of the first gene therapies because the girls began receiving a new drug treatment that replaces the missing enzyme just before receiving the genetic therapy and they continue to receive the drug after the genetic treatment.
10.Meteorites from Mars occasionally hit earth.Bacteria or their spores can probably survive the journey through space,despite the cold and intense radiation,which means that primitive life might once have been carried between the planets of the solar system,an idea called panspermia.