[单项选择]{{B}}第三篇{{/B}}

{{B}}Underground Coal Fires -- a Looming Catastrophe{{/B}} Coal burning deep underground in China, India and Indonesia is threatening the environment and human life, scientists have warned. These large-scale underground blazes cause the ground temperature to heat up and kill surrounding vegetation, produce greenhouse gases and can even ignite forest fires, a panel of scientists told the annual meeting of the American Association for the Advancement of Science in Denver. The resulting release of poisonous elements like arsenic and mercury can also pollute local water sources and soils, they warned. "Coal fires are a global catastrophe," said Associate Professor Glenn Stracher of East Georgia College in Swainsboro, USA. But surprisingly few people know about them. Coal can heat up A. Coal heats up on its own and catches fire and burns. B. The underground oxygen will be used up. C. Poisonous fumes and greenhouse gases will be accumulated underground. D. There will be an increase of abandoned mines. 查看答案 更多"{{B}}第三篇{{/B}}"的相关试题: [单项选择]{{B}}第三篇{{/B}} {{B}}Plant Gas{{/B}} Scientists have been studying natural sources of methane for decades but hadn’t regarded plants as a producer, notes Frank Keppler, a geochemist at the Max Planck Institute for Nuclear Physics in Heidelberg, Germany. Now Keppler and his colleagues find that plants, from grasses to trees, may also be sources of the greenhouse gas. This is really surprising, because most scientists assumed that methane production requires an oxygen-free environment. Previously, researchers had thought that it was impossible for plants to make significant mounts of the gas. They had assumed that microbes need to be in environments without oxygen to produce methane. Methane is a greenhouse gas, like carbon dioxide. Gases such as methane and carbon dioxide trap heat in Earth’s A. a oxygen-free environment. B. an environment with the same concentration of oxygen as the Earth has. C. a carbon dioxide-free environment. D. an environment filled with the greenhouse gas. 查看答案 我来回答: 提交 最新试题 ●    下述每组皆为井穴，选出一组井穴其五行属性皆为木（）。 ●    [填空题]高速铁路工务部门应急处置实行( )h值班制度。 ●    When I came across her in the street yesterday, sh ●    房地产经纪行业管理的基本原则是( )。 ●    [判断题]处理船舶事故，需要潜水队员下水施救时，应两人以上编组下潜，由**向下游搜索，必要时应有 ●    甲单位为非中央级从事环境保护的事业单位，实行国库集中支付和政府采购制度。经财政部门核准，甲单位的工资 网站地图 我要搜题网  版权所有  ©2023  湘ICP备18016427号   购买搜题卡查看答案 [会员特权] 开通VIP， 查看 全部题目答案 [会员特权] 享免全部广告特权 推荐91天 ¥36.8 ￥80元 31天 ¥20.8 ￥40元 365天 ¥88.8 ￥188元 请选择支付方式 微信支付 支付宝支付 点击支付即表示同意并接受了《购买须知》 立即支付 系统将自动为您注册账号 已有账号登录 找回账号密码 请使用微信扫码支付 订单号： 请不要关闭本页面，支付完成后请点击【支付完成】按钮 支付完成 取消支付 恭喜您，购买搜题卡成功 系统为您生成的账号密码如下： 账号 密码 重要提示：请拍照或截图保存账号密码！ 我要搜题网官网：https://www.woyaosouti.com 我已记住账号密码