karen pereira, as an independent research, his written a book on solving the san crisis. she sites a report from an environmental group last year that counted 193 people who died through illegal fan mining and india. and just 2 years, when me remove sand from such huge, massive quantities, it's bound to have impacts. and they've been back at the moment. i've externalized dr. society and until within that linked big bag, not then not reflected in the costs of the saturday gap at or shan mining as to climate threats. like rising sea levels and dropped it, erodes beaches, destroys river beds and makes landslides more likely. an estimated half a 1000000 people living along the meek on river will need to be moved from collapsing river banks. partly because of sand mining in india is pushed. species like the gary crocodile to the verge of extinction. so how can we sold the global san crisis expert say the 1st step is cutting the amount of concrete we use. that could mean using more efficient concrete mixes with less cement or replacing it altogether with alternatives like timbo