But girls are just as curious about the way the world works—they just haven't jumped into the culture of chemical reactions, energy and magnetic force with as much enthusiasm. That is, until they see one of Tatiana's videos showing the science behind real life's magic.
Young girls are attracted to Tatiana's attractive demonstrations the way they flock to pop concerts.
They both teach at Texas A&M, and when Tatiana isn't in the classroom, she is doing outreach with schoolchildren, amazing them with spinning lights that soon form words, liquid oxygen that shrinks objects and chemical reactions that expand matter to 10 times its size.
According to the study, the carbon balance of the Amazon rainforest is damaged largely due to large-scale human disturbance to the Amazon ecosystem, with wildfires—many deliberately set to clear land for agriculture and industry—responsible for most of the CO₂ emissions from the region and the hotter dry seasons.
The second bad news is that the places where deforestation is 30 percent or more show carbon emissions 10 times higher than the places where less than 20 percent of forest is destroyed.
Posted in课件