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DEET is often sold and used in spray or lotion in concentrations up to 100%. [13] Consumer Reports found a direct correlation between DEET concentration and hours of protection against insect bites. 100% DEET was found to offer up to 12 hours of protection while several lower concentration DEET formulations (20–34%) offered 3–6 hours of ...
DEET (an insect repellant) and caffeine were found in all water types and in virtually all samples. Triclosan (in antibacterial soap and toothpaste) was found in all water types, but detected in higher levels (parts-per-trillion) in reclaimed water than in surface or groundwater. Very few hormones/steroids were detected in samples, and when ...
A new study has found that DEET, the active ingredient in many mosquito and insect repellents, can be toxic to the reproductive health of worms - warranting further investigation into its ...
Silent Spring is an environmental science book by Rachel Carson. [ 1] Published on September 27, 1962, the book documented the environmental harm caused by the indiscriminate use of DDT, a pesticide used by soldiers during WW2. Carson accused the chemical industry of spreading disinformation, and public officials of accepting the industry's ...
However, a study in Thailand found the cost per malaria case prevented of DDT spraying (US$1.87) to be 21% greater than the cost per case prevented of lambda-cyhalothrin–treated nets (US$1.54), [165] casting some doubt on the assumption that DDT was the most cost-effective measure.
The Clean Water Act has made great strides in reducing point source water pollution, but this effect is overshadowed by the fact that nonpoint source pollution, which is not subject to regulation under the Act, has correspondingly increased. [41] One of the solutions to address this imbalance is point/nonpoint source trading of pollutants.
Water pollution (or aquatic pollution) is the contamination of water bodies, with a negative impact on their uses. [ 1]: 6 It is usually a result of human activities. Water bodies include lakes, rivers, oceans, aquifers, reservoirs and groundwater. Water pollution results when contaminants mix with these water bodies.
The Clean Water Act is the primary federal law regulating water pollution in the United States. The language of the Clean Water Act describes itself as pertaining to "Waters of the United States". The act defines these waters as "navigable waterways", which connects the act to constitutional authority to regulate interstate commerce.