There are no legal restrictions on catalysts operation, since they are harmless to environment.
However, natural dye is biodegradable and non-toxic having most of the extraction process harmless to environment.
Although both compostable and biodegradable materials break down and transform into something harmless to the environment, compostable pods can undergo this metamorphosis more quickly.
It was inferred that acetic anhydride could accelerate the hydrolysis of tetraethyl orthosilicate and the obtained by-product of acetic acid was harmless to the environment.
As it supplies solar power, a priori considered harmless for the environment and human health compared with fossil fuels, the photovoltaic (PV) industry seems to contribute optimally to reduce greenhouse gas emissions and, overall, to sustainable development.
Hydrogen is an ideal energy source due to its harmless effect to environment [1].
Moreover, cleaning procedures which can also assure to be harmless to the environment and the operators are particularly valued nowadays.
For that reason, the control of industrial effluents is an indispensable job which helps in the creation of a harmless and clean environment.
Bioflocculants from microbial source have drawn an increasing interest because they are biologically active, biodegradable, nonpolluting and harmless to the environment, hence can be a substitute for conventional chemical flocculants.
An ideal disinfectant should have inactivating properties towards many species of microorganisms, should not induce forming of DBPs, must not negatively impact human health and should be low cost, easy to handle and to keep, non-invasive for work tools and harmless to the environment.
In 2009, he tried to argue that carbon emissions are harmless to the environment, noting how prevalent carbon dioxide is in everyday life.
