Since the launch of the "Reinvent the Toilet Challenge", more than a dozen research teams, mainly at universities in the U.S., Europe, India, China and South Africa, have received grants to develop innovative on-site and off-site waste treatment solutions for the urban poor. The grants were in the order of 400,000 USD for their first phase, followed by typically 1-3 million USD for their second phase; many of them investigated resource recovery or processing technologies for excreta or fecal sludge.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What did many investigate 
Ah, so.. many of them investigated resource recovery or processing technologies for excreta or fecal sludge.

Age, diameter, height, radial growth, geographical location, site and growing conditions, silvicultural treatment, and seed source, all to some degree influence wood density. Variation is to be expected. Within an individual tree, the variation in wood density is often as great as or even greater than that between different trees (Timell 1986). Variation of specific gravity within the bole of a tree can occur in either the horizontal or vertical direction. :)
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What specific type of growth has an effect on the density of wood?
Ah, so.. radial

Gandhi Smriti in New Delhi is the location where Mahatma Gandhi spent the last 144 days of his life and was assassinated on 30 January 1948. Rajghat is the place where Mahatma Gandhi was cremated on 31 January 1948 after his assassination and his ashes were buried and make it a final resting place beside the sanctity of the Yamuna River. The Raj Ghat in the shape of large square platform with black marble was designed by architect Vanu Bhuta.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): In which city is the Gandhi Smriti located?
Ah, so..
New Delhi