In both processes, hydrogen not only reduces iron oxides but can also get trapped inside the produced metal. The latter effect has fueled concerns about the amount of hydrogen remaining in green steel, as even a few ppm of diffusible and weakly trapped hydrogen can have an enormously emb...
Students in a classroom with CO2levels of 2500 ppm had much worse test scores than at 1000 ppm. REDUCING CO2 CO2levels rise and fall regularly indoors. There are many factors that affect CO2levels including ventilation, amount of people, and length of time in an enclosed space. ...
The level of carbon dioxide in the atmosphere being almost 400 ppm is itself a threat to the future generations. The world had come together to fight the rising level of co2 but with no watershed achievement apart from setting some... A Kaintura,M Gusain 被引量: 0发表: 2016年 加载更多研...
aOxides of carbon, sulfur, and nitrogen are important constituents of the atmosphere and are pollutants at higher levels. Of these, carbon dioxide, CO2, is the most abundant. It is a natural atmospheric constituent, and it is required for plant growth. However, as discussed in Chapter 15, ...
Explain why either greatly decreasing or increasing the percentage of oxygen in the atmosphere is dangerous. The color change of the bromothymol blue with water is caused by carbon dioxide from your breath. How can you test this hypothesis?
The greenhouse effect happens because of certain naturally occurring substances in the atmosphere. Unfortunately, since the Industrial Revolution, humans have been pouring huge amounts of those substances into the air. Carbon dioxide(CO2) is a colorless gas that is a by-product of the combustion of...
Carbon dioxide (CO2) is a colorless gas that is a by-product of the combustion of organic matter. It makes up less than 0.04 percent of Earth's atmosphere, most of which was put there by volcanic activity very early in the planet's life. Today, human activities are pumping huge amount...
The climate impact of CH4, combined with the still under-investigated indirect effect of higher H2 ppm in the atmosphere (Ocko and Hamburg, 2022; Warwick et al., 2022), should cast serious doubts over the prospects of blue hydrogen. According to Hauglustaine et al.,2022), over a 20-...
Climate sensitivityis the estimate of how much the earth'sclimatewill warm in response to the increasedgreenhouse effectif we manage, against all the good advice, to double the amount ofcarbon dioxidein theatmosphere. This includes feedbacks that can either amplify or dampen the warming. Ifclimate...
The IPCC says that the pre-industrial amount of CO2 in the Earth's atmosphere was about 280 parts per million (ppm), meaning that for every million molecules of dry air, 280 of them were CO2. In contrast, 2005 levels of CO2 were measured at 379 ppm [Source: IPCC]. ...