California uses light-blocking plastic balls to conserve water

Battling a record dry spell that has left reservoirs badly drained, the Las Virgenes County water district on the outskirts of Los Angeles has decided to fill its reservoir with hundreds of black plastic balls. The balls sit on top of the water and block the sunlight from hitting it, helping to reduce water evaporation as well as natural contamination and certain chemical reactions that could cause algae blooms in the reservoirs. Aug 13, 2015

Cancun swamped with algae as golden beaches turn green

At the height of the Caribbean summer, Cancuns iconic golden beaches have turned green as tonnes of seaweed wash up on the shore. The gulfweed algae stretches more than 110 miles and has been washing ashore continuously in recent weeks, said officials. Aug 4, 2015