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Apart from an increase in the boy’s hyperactivity, the couple saw “no result whatsoever,” Concepcion said.

"Our approach is an important step toward finding an efficient way to convert CO2, a potent greenhouse gas that poses a significant challenge for humanity, into an easily storable and transportable liquid fuel," said Brookhaven Lab Senior Chemist Javier Concepcion, a lead author on the study.

"Converting CO2 to methanol is very difficult to achieve in a single step. It is energetically akin to climbing a very tall mountain," Concepcion said.

"Catalysts enable reaching the next valley through 'tunnels' that require less energy than climbing over the mountain," Concepcion said.

Now, Alex and his 8-year-old brother run next to walls where the government has painted over the gang graffiti, so María ��DzԳ���賦��ó�� Ventura sees benefits to the crackdown.