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The health of the trees in one of San Diego’s largest park is getting some extra attention because the urban forest here isn’t as healthy as it used to be.

They are urging the international community for more resources to help manage climate change and calling for larger countries to cut their carbon emissions.

Lack of water has an impact on most aspects of life in San Diego. Sewer districts are also coping with the effects of prolonged drought.

The Pentagon wants university researchers to find ways to protect crops in the field using infectious viruses carried by insects. Critics think it looks like bioweapons research.

Fallowing is the biggest chunk of the cost of the drought. According to a UC Davis study, California's drought will cost state agriculture $1.84 billion in 2015.

Sam Rainsy of the now-banned Cambodia National Rescue Party was barred from boarding a plane from Paris to Thailand. His deputy was detained in Malaysia. Both risk arrest if they enter Cambodia.

In his new book, "Let There Be Water," author Seth M. Siegel outlines how Israel was able to solve its water crisis and how it can be a model for the rest of the world.

In April, the president put $450 million on hold for Guatemala as well as Honduras and El Salvador over what he described as the failure of their governments to stem the flow of migrants to the U.S.

There's cause for pessimism and optimism in the year ahead as our expert sources share their predictions. Plus: Print and fold your own global trends zine.

After a scientist on a hike in Sequoia National Park saw trees with thin and browning leaves, it got scientists thinking: Did the drought cause this? So they're climbing up them to study the damage.