Hannah Hoag | news

Air pollution delivers smaller babies

Posted February 6, 2013 by Hannah

Study of 3 million infants suggests connection between inhaled particles and birth weight. Pregnant women who have been exposed to higher levels of some types of air pollution are slightly more likely to give birth to underweight babies, a large international study has found. The results are published online today inEnvironmental Health Perspectives1. Low birth weight — defined as a newborn baby weighing less than 2.5 kilogrammes — increases the risk of infant mortality and childhood diseases, and has been associated with developmental and health problems later in life, including diabetes and cardiovascular disease. Previous studies have looked at whether … Read more…

These Young Leaders Are Influencing the Future of the North

Posted December 9, 2012 by Hannah

Arctic Deeply These are the people who stand apart when it comes to improving education, fighting climate change, boosting international collaboration and revitalizing Indigenous culture in the Arctic.

Arctic snow cover shows sharp decline

Posted October 31, 2012 by Hannah

Earlier spring could spell trouble for permafrost Arctic snow is fading fast. June snow cover in the Northern Hemisphere has dropped by almost 18% per decade during the past 30 years, according to a study published in Geophysical Research Letters1. The drop in snow extent will lower the amount of sunlight reflected away from the planet — a process that has a cooling effect — by exposing darker and less reflective soil, shrubs and trees, which absorb solar radiation and re-emit the heat into the atmosphere. The change also stands to warm the permafrost, alter the timing of spring runoff into … Read more…

Test lakes face closure

Posted August 21, 2012 by Hannah

Lake 239 looks inviting. Pines and spruce fringe the shoreline and waves lap against outcrops of weathered granite. But on this hot August afternoon in northwestern Ontario (see ‘Water works’), one feature stands out. At the far end of the 800-metre-long lake, a series of plastic-walled columns descend from a floating dock to the muddy bottom about 2 metres down. They are the sign that the lake’s placid setting disguises an experiment in controlled environmental abuse. Jennifer Vincent, a graduate student at Trent University in Peterborough, Ontario, kneels by one of the columns and empties a vial of silver nanoparticles into … Read more…