The simple fact of higher time frames that makes me concentrate most of my trading efforts on them instead of their lower time frame counterparts is that they act as natural filters of price movement, filtering out the price action that is not useful and leaving with you with a much clearer picture of what price is likely to do. (learntotradethemarket.com)
PNNL researchers tested the adsorbents developed at ORNL and other laboratories, including universities participating in the Nuclear Energy University Program, using natural filtered and unfiltered seawater from Sequim Bay in Washington under controlled temperature and flow - rate conditions. (pnnl.gov)
Environmental groups, including Midwest Environmental Advocates and the Wisconsin League of Conservation Voters, said the state's proposal rolls back protections for wetlands, which act as natural filters for drinking water and wildlife habitats, and protect against flooding. (businessinsider.com)