Deserts are barren areas of land where little precipitation occurs, resulting in living conditions that are hostile for plant and animal life. These regions are typically defined by low average annual rainfall—usually 100 millimeters (less than 4 inches) of rain per year or less.
A group of scientists and engineers at McMaster University in Hamilton, Ontario, has developed a new technology that could replace traditional “best before” dates on food and beverages with a definitive indication of the safety of the product.
It sure seems like extreme weather is increasingly common: floods, droughts, extreme rainfall, powerful snowstorms, hurricanes and so on. But we tend to focus on recent events and often give them undue emphasis. So, it is reasonable to ask whether extreme weather really is more common these days.
The Great Pacific Garbage Patch is the world’s largest collection of floating trash. It lies between California and Hawaii and is popularly described as being larger than Texas. It was discovered in 1997 by a yachtsman who sailed through a mess of floating plastic bottles and other debris while on a voyage between Hawaii and Los Angeles.
If we want to avoid drastic global warming this century, we need to sharply reduce greenhouse gas emissions over time. For the previous three years, emissions had been holding steady, but last year, global emissions from the use of coal, oil and natural gas increased by 1.4%. According to the International Energy Agency, this unfortunate new data should serve as a strong warning that we need to increase our efforts to combat climate change.
Last spring, we talked about a solar-powered water harvester designed to pull water out of even dry desert air. The prototype device was described in a paper by scientists at UC Berkeley and MIT in the journal Science.
Many of us are well aware of the environmental challenge faced because of the proliferation of plastics. Since plastic does not decompose naturally, most of it remains in our environment. Only 12% has been incinerated and only 9% has been recycled. A great deal of plastic ends up in the ocean and other bodies of water. Much of it breaks down into small particles – microplastics – which are now ubiquitous in the oceans. There are also microplastics that started out that way in the form of little beads used in the cosmetics industry. Studies have found microplastics in the bodies of 73% of fish from the North Atlantic.
Worldwide, deforestation and land disturbance are responsible for about a quarter of all greenhouse gas emissions. The largest contributor to this problem is Indonesia and getting control of its emissions is a crucial part of meeting global carbon reduction targets.
More and more often we make use of “the cloud” – that mysterious place where we store, move, process and analyze data. We keep our photos there. We stream music and videos from there. We do our work there. Perhaps we have a mental image of all of this digital information floating above our heads in some ethereal way: like in a cloud.
Burning natural gas instead of coal is considered to be an important way to reduce greenhouse gas emissions. In principle, it is. Gas combustion produces much less carbon dioxide than coal combustion.
Scientists studying marine life have to figure out ways to get cameras into areas that are too dense or dangerous for people to enter. This often means sending delicate equipment into places where collisions are both likely and damaging and that equipment is generally tethered to ships or other objects. To really see what is going on in the underwater world, a better approach is needed.
The list of endangered species continues to get longer around the world and society is increasingly faced with the nearly impossible decision of which ones to take off life support.
Almost everyone everywhere comes into contact with plastic everyday. Its use has increased 20-fold in the past half-century, and production is expected to double again in the next 20 years. But is plastic so ubiquitous that we are unwittingly drinking the stuff?
Resistance to antibiotics is a rising problem that costs an estimated 700,000 lives each year. Some experts predict that if the problem can’t be solved, that number could grow to 10 million deaths annually by 2050. As a result, researchers around the world are investigating multiple ways to help fight antibiotic resistance.
The United States has now added the capacity to store a billion watts of power for one hour and it may double that total by the end of this year. According to the firm GTM Research, the energy storage industry – previously nearly invisible – is undergoing rapid growth. Much of the growth has been in homes with products like the Tesla Powerwall but has also been on the scale of the electric grid, where power companies can use storage to control when to deploy excess electricity generated from renewable sources such as solar power.
Blacktip sharks are snowbirds, to use a cross-species metaphor. At least, they usually are. The males of the species swim south to southern Florida during the coldest months of the year and head back north to North Carolina in the spring to mate with females.
Poaching and habitat loss have reduced Central African elephant populations by 63% since 2001. These losses not only pose dire consequences for the elephants themselves but also for the forests in which they live.
According to a new study recently published in the journal Climatic Change, up to half of the plant and animal species in the world’s most naturally-rich areas could face local extinction by the turn of the century due to climate change. This projection, jeopardizing the biodiversity in places like the Amazon and the Galapagos, assumes carbon emissions continue to rise unchecked.
Herbicide-resistant weeds are becoming a more and more common problem for farmers growing grain and vegetable crops. As a result, the farmers are looking for alternatives to herbicides to control weeds. One promising approach is the use of cover crops, which are planted in the off season to protect the soil. Thick cover crop growth can often compete well with weeds during the cover crop growth period, and can prevent most germinated weed seeds from completing their life cycle and reproducing.
The phenomenon of urban heat islands has been well known since the 19th century. The materials from which city buildings and roads are made reflect much less solar radiation and absorb more of it than the vegetation they have replaced. The absorbed energy is then radiated in the form of heat into the surrounding air making cities warmer.
