How many countries celebrated the Earth Hour 2019?

Which IIT has successfully converted petroleum waste toluene into a useful product?

The European Union has launched two World Trade Organization (WTO) disputes against which two countries?

European Parliament has banned single-use plastic, it will be effective from which year?

What is the theme of the 13th edition of Earth Hour 2019?

Who won the ETPrime 'Global Indian Woman of the Year'?