algae

Call to locals and tourists to aid experts counter the green gunge 'polluting' world's deepest lake.

Is increased tourism, or a normal natural cycle, to blame for the rapid growth of spirogyra to 50% of the coastline?

Concern over world's oldest and deepest lake as nasty odour and green algae discourages sunbathers in Buryatia.

Scientist warns of 'environmental disaster' due to 'irreversible' pollution in world's deepest and oldest lake.

In beach resort of Listvyanka alone, 98 contaminated streams are disgorging sewage and chemical waste into the pristine waters of the world's oldest lake.

Famed for the purest water on the planet, but this 'is no longer true' with 'no drinking' warning in southern part of lake.

Vital for making its waters so 'pure', one theory is that rising underwater methane leaks are killing off the sponge, but is there a silver lining?