Is there more good news than bad? A new battery is one reason to be cheerful among many.
Behold: the clean battery of the future
Cotton candle: Just two grams of cotton are needed for each battery cell. Glossary
AI - A computer programme that has been designed to think.
Dengue - A debilitating viral disease transmitted by mosquitoes.
European Union - A political and economic union of 27 countries.
Pesticides - Poisons used for destroying insects and plants.
Gaza - The smaller of two Palestinian territories, home to two million people. It is located on the Mediterranean coast, bordered by Israel and Egypt.
Myanmar - The largest country in mainland south-east Asia, formerly known as Burma. It is an ethnically diverse place, something that has often resulted in fierce conflict.