Folks singers Megan Murphy and Timothy Hull, interactive information booths, a treasure hunt, a salmon story-teller, and great food. Media sponsors include KXL Radio, Jammin' 95.5, and Portland Family Magazine. Registration forms for the run are available at Nature's stores and NikeTown, and most other running and fitness outlets-or register on line. About Global Warming. Over the last hundred years, the planet has heated up by more than one degree Fahrenheit.
Most climate scientists believe the cause of the warming is pollution from cars and power plants.
Carbon-dioxide emissions from fossil fuel combustion have built up in the atmosphere, creating a greenhouse effect. While a handful of vocal skeptics have questioned whether global warming was real, in recent years the evidence supporting the greenhouse theory has become overwhelming. The latest nail in the skeptic's coffin was a March report in Science that average ocean surface temperatures have increased by half a degree over the last 40 years. In Oregon, the biggest impact of the warming will be a large reduction in snowfall. This will lead to a dramatic decline in summer flows for the region's rivers and streams-flows that are needed to maintain salmon habitat, support irrigation, and produce electric power.