Many policy interventions intended to benefit public health can only be evaluated as so-called natural experiments, because implementation is not controlled by researchers seeking to assess effectiveness. Such assessments can be complicated by non-comparability between people affected and not affected by the intervention. Various quasi-experimental designs have been proposed to address this problem of non-comparability, one being the regression discontinuity design, which has had little use in public health.

Constructing complete, accurate plant DNA barcode reference libraries can be logistically challenging for large-scale floras. Here we demonstrate the promise and challenges of using herbarium collections for building a DNA barcode reference library for the vascular plant flora of Canada.

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The Mactaquac Dam and Generating Station, a 672 MW run-of-the-river hydroelectric facility located on the Saint John River, Canada, will have to be decommissioned or reconstructed by 2030. In order to simulate the impact of reservoir emptying (drawdown) and climate change on the thermal regime of the lower reaches of the river, the CEQUEAU hydrological and water temperature model was used.

Montreal - Mice in Canada are mutating and migrating farther north in response to climate change, according to McGill University research released on Monday.

Appeals court rules against mining company Nevsun Resources, clearing way for workers to have claims of human rights violations heard in Canadian court

The Arctic marine environment is undergoing a transition from thick multi-year to first-year sea-ice cover with coincident lengthening of the melt season. Such changes are evident in the Baffin Bay-Davis Strait-Labrador Sea (BDL) region where melt onset has occurred ~8 days decade−1 earlier from 1979 to 2015. A series of anomalously early events has occurred since the mid-1990s, overlapping a period of increased upper-air ridging across Greenland and the northwestern North Atlantic. We investigate an extreme early melt event observed in spring 2013.

More than 120 birds in Canada’s oil heartland of Alberta were killed after getting caught in a pond of oil sands byproducts operated by the country’s largest producer, Suncor Energy Inc, the local

Forests in the northeastern United States and southern Canada could be ravaged by tree-killing beetles in coming decades as a warming climate expands the pest's habitat, a study has found.

IN POOR countries people are living longer and healthier lives than ever. Since 2000 child mortality has fallen by almost half. The rate of new HIV/AIDS infections has dropped by 40%.

As conditions warm, fish and wildlife living at the southern edge of their species' ranges are most at risk, according to Penn State researchers who led a major collaborative study of how wood frog

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