Invasive ascidians — sac-like marine invertebrate filter feeders — are nuisance organisms that present a global threat. They contribute to biodiversity loss, ecosystem degradation and impairment of ecosystem services around the world.

A new Tel Aviv University study finds that ships play an unknowing but dominant role in introducing and dispersing these tough-shelled non-indigenous organisms into new environments. The research showed that these marine invertebrates hitch a ride on half of all the marine vessels passing through Israel's Mediterranean coast.

Study indicates concrete construction waste can help rid the air of sulfur dioxide, a major pollutant.

Cities plagued with terrible traffic problems may be overlooking a simple, low-cost solution: High-occupancy vehicle (HOV) policies that encourage carpooling can reduce traffic drastically, according to a new study co-authored by MIT economists.

The results show that in Jakarta, Indonesia, travel delays became 46 percent worse during the morning rush hour and 87 percent worse during the evening rush hour, after an HOV policy requiring three or more passengers in a car was discontinued on important city center roads.

Spilt crude oil has repeatedly polluted and even destroyed marine ecosystems. An effective measure would be to remove spilt oil slicks by absorption into a separable solid phase. As Indian scientists now report in the journal Angewandte Chemie, congelation of the oil to a rigid gel within impregnated cellulose and scooping the particles out is possible.

As the infamous floating “garbage patch” churns up bits of plastic in the tropical Pacific Ocean, a University of Washington undergraduate has discovered a related problem much closer to home: nearly invisible bits of plastic on Puget Sound beaches.

As a year-long project toward a UW bachelor’s degree, the oceanography major visited 12 beaches around Puget Sound to tally the number of microplastics, generally classified as fragments between 0.3 and 5 millimeters (1/100 to 1/5 of an inch) or smaller than a grain of rice.

The Swedish-based carmaker, Volvo, will build only electric or hybrid-electric cars beginning in 2019, making it the first big auto company to abandon conventional gasoline-powered engines. 

The legendary auto manufacturer, now a wholly owned subsidiary of a Chinese company, had earlier set a goal of selling one million electric cars and hyrids by 2025. “This is how we are going to do it,” President and CEO Hakan Samuelsson said in a statement. 

Harvard University researchers have resolved a conflict in estimates of how much the Earth will warm in response to a doubling of carbon dioxide in the atmosphere.

Farmers earn more profits when there is demand for corn for biofuel instead of for food only. This can lead some to convert grasslands and forests to cropland. This conversion, also called indirect land use change, can have large-scale environmental consequences, including releasing stored carbon into the atmosphere. To penalize the carbon emissions from this so-called indirect land use change, the USEPA and California Air Resources Board include an indirect land use change factor when considering the carbon savings with biofuels for their compliance with the federal Renewable Fuel Standard or California’s Low-Carbon Fuel Standard.

Atmospheric aerosols are tiny particles that scatter and absorb sunlight but also influence climate indirectly through their role in cloud formation. One of the largest sources of aerosols is sea spray which is produced over the world’s oceans. Understanding how these particles take up water from the atmosphere, their so-called hygroscopicity, is important because it determines how much sunlight they reflect and how well they can form clouds.

Researchers from Universidad Politécnica de Madrid suggest a new methodology to assess the environmental impact of the containers used for the collection of urban waste.

An inappropriate design of a container system might unnecessarily aggravate the impact on environment when collecting and transporting the urban waste. This is the major conclusion of a team of researchers from Universidad Politécnica de Madrid after carrying out a systematic evaluation process of the urban containerization system.