Energy from biomass plays a large and growing role in the global energy system. Energy from biomass can make significant contributions to reducing carbon emissions, especially from difficult‐to‐decarbonize sectors like aviation, heavy transport, and manufacturing. But land‐intensive bioenergy often entails substantial carbon emissions from land‐use change as well as production, harvesting, and transportation. In addition, land‐intensive bioenergy scales only with the utilization of vast amounts of land, a resource that is fundamentally limited in supply. Because of the land constraint, the intrinsically low yields of energy per unit of land area, and rapid technological progress in competing technologies, land intensive bioenergy makes the most sense as a transitional element of the global energy mix, playing an important role over the next few decades and then fading, probably after mid‐century. Managing an effective trajectory for land‐intensive bioenergy will require an unusual mix of policies and incentives that encourage appropriate utilization in the short term but minimize lock‐in in the longer term.
For decades engineers have dreamed of programming organisms to sustainably produce ethylene, a chemical that is nicknamed “the king of petrochemicals” for its importance in plastics. Now, one hopeful pathway to this petrochemical is nearing reality, via a photosynthetic bacterium that is genetically specialized to turn sunlight and carbon dioxide (CO2) into ethylene. But before industry can load up on tanks of living green liquid, researchers are first overcoming some metabolic barriers around ethylene production.
Much to the annoyance of her physicist father, Meredith Doyle chose to study chemistry.
She chose that field, in part, to follow her own path, but also because chemistry builds everything in the world. And more than anything, Doyle wants to change the world as quickly as humanly possible. It is not surprising, then, that she is working on one of the biggest, most urgent global challenges—one that has infiltrated landfills, oceans, rain water, and fish worldwide: plastics waste.
There is more carbon dioxide in the atmosphere than there has been for 800,000 years — since before our species evolved.
On Saturday (May 11), the levels of the greenhouse gas reached 415 parts per million (ppm), as measured by the National Oceanic and Atmospheric Administration's Mauna Loa Observatory in Hawaii. Scientists at the observatory have been measuring atmospheric carbon dioxide levels since 1958. But because of other kinds of analysis, such as those done on ancient air bubbles trapped in ice cores, they have data on levels reaching back 800,000 years.
Behind the phenomena of global warming and climate change lies the increase in greenhouse gases in our atmosphere. A greenhouse gas is any gaseous compound in the atmosphere that is capable of absorbing infrared radiation, thereby trapping and holding heat in the atmosphere. By increasing the heat in the atmosphere, greenhouse gases are responsible for the greenhouse effect, which ultimately leads to global warming. (The effects of global warming can been seen across the globe.)
Earth's atmosphere is a thin band of air made up of numerous layers based on temperature. Without this protective blanket, life on Earth would not exist as it protects us from heat and radiation emitted from the sun and contains the air we breathe.
Though oxygen is crucial for life on Earth, it is not the primary component of our atmosphere. According to education site Vision Learning Earth's atmosphere is composed of approximately 78 percent nitrogen, 21 percent oxygen, 0.93 percent Argon, 0.04 percent carbon dioxide as well as trace amounts of neon, helium, methane, krypton, ozone and hydrogen, as well as water vapor.
Even more sniffling and sneezing: Longer allergy season possible due to climate change, study suggests
The seasonal sniffling and sneezing could last longer for allergy sufferers. A recent study published in the journal Nature Communications suggested that climate change will lengthen allergy season.
Two scientists from the University of Michigan examined climate data and pollen data and found that pollen emissions later this century would likely start 10-40 days earlier in the spring and end up to 19 days later in the fall.
Scientific researchers and a federal agency are putting out a warning that much of the U.S. faces hot, dry conditions this summer.
The country’s grain-producing heartland will be at the eastern edge of the conditions that have plagued California and other Western states since the summer of 2020, according to the National Oceanic and Atmospheric Administration’s Spring Outlook.
In this activity, students will learn about sea ice and land ice. They will observe ice melting on a solid surface near a body of water and ice melting in a body of water. Prior to the activity, students will predict what each situation will do to the level of water and then compare their prediction to what they observe.
Jim Hourdequin is one of the planet’s biggest sellers of carbon offsets—the widely used instruments that are supposed to act as a balm for the rapidly overheating climate. His company earned $53 million from these environmental transactions over the past two years.