Starship's nearly self-driving robots are also powered by rechargeable lithium-ion batteries, so they're relatively quiet and clean compared to something like diesel trucks idling on your corner, or the hoopty a driver may use for their pizza delivery job.
captures carbon emissions where this pollution is generated, and turns the CO2 into chemicals like methane, ethylene and ethanol, gases that are used to make plastics, surfactants, detergents and fuels that burn relatively clean, as compared to diesel and gasoline.
Since natural gas is a relatively clean fuel, compared to other fossil fuels, the results of this WTW-LCA study can be used in conjunction with other natural gas life cycle studies to help quantify its potential environmental, health, and ecological benefits [88, 89, 90, 91, 92, 93, 94].
Shale gas is a relatively clean fuel when compared to coal or oil, releasing a lower amount of greenhouse gases when used as a source of energy.
However, it's easy to navigate, relatively clean, and though it's expensive compared to other subway systems, it's much more cost-effective and time-efficient than attempting to drive.
"It's a bit pious to say it, but I do think we are relatively clean even in the at-risk sports compared to a lot of our competitor countries," Boultbee said.
An initial olivine grain surface (A) is relatively "clean" from pit marks, etching and precipitates compared with the incubated grains which show a slight increase in small crystal precipitates on the surface (B) and pit marks (C).
F. heteroclitus from these chronically polluted areas are resistant to the aromatic hydrocarbons in their environment as compared to nearby fish from relatively clean environments [ 45- 52].
