For China, India, and many other rapidly-developing countries, water scarcity will increasingly and negatively affect growth-with 2.7 billion people living in water scarce basins in these countries alone by 2050, up from 1.4 billion today.
Replace window putty if it has become old and cracked. Window putty commonly is referred to as glazing compound. It is made to remain semi-flexible throughout its lifetime, so it both firmly holds the glass in place and keeps the edges of the glass leakproof. Properly installed putty looks like an extension of the window frame, and can be painted to match.
Tips for how to remove old putty. Heat will soften the putty BUT be careful! Excessive, localised heat on the glass will cause it to crack. So if using a heat gun, protect the glass with a shield (eg. a piece of hardboard). You can also use a steamer with a fine nozzle. Use a blunt chisel as a scraper and you will find by heating, you've knocked 2 hours off the job.