what was one environmental issues facing both the United states and Canada

Oceans warming displacing or killing fish (am biased - from Gloucester)

bonus:
More extreme weather patterns

One environmental issue that both the United States and Canada face is climate change. To validate this, we can follow these steps:

Step 1: Research relevant information sources:
For trusted and up-to-date information, we can refer to reputable environmental and scientific organizations, such as:
- The Intergovernmental Panel on Climate Change (IPCC)
- National Aeronautics and Space Administration (NASA)
- Environmental Protection Agency (EPA)
- Natural Resources Canada

Step 2: Explore scientific reports and assessments:
We can search for scientific reports and assessments specific to each country. The IPCC releases comprehensive reports on climate change, outlining global impacts and regional nuances. The EPA and Natural Resources Canada provide valuable data on the impacts and initiatives within their respective countries.

Step 3: Analyze shared challenges:
By comparing the reports and assessments from both sources, we can identify common environmental challenges. In the case of climate change, both the United States and Canada experience similar issues, such as:
- Increased temperatures leading to heatwaves and wildfires
- Changing precipitation patterns affecting agriculture and water availability
- Rising sea levels threatening coastal communities
- Melting Arctic ice impacting ecosystems and indigenous communities

By following these steps, we can confirm that climate change is an environmental issue faced by both the United States and Canada.