Traduction de «pouvoir évaporant de l'atmosphère » (Français → Anglais) :

But under the influence of those who believe they can secure political gain from xenophobic sentiments, a climate of uncertainty has emerged.

The antennae would have to be fitted to masts 1.8 km high in order for a link to be established. For this reason, an intercontinental microwave radio link of this kind is simply not feasible, setting aside the issue of the attenuation of the signal by air and water vapour.

Whereas a significant step in a strategy for an overall reduction of VOC emissions in the Community was taken by Council Directive 91/441/EEC of 26 June 1991 amending Directive 70/220/EEC on the approximation of the laws of the Member States relating to measures to be taken against air pollution by emissions from motor vehicles (5) which aims at reducing by some 80 to 90 %, over 10 to 15 years, VOC emissions from tail-pipe exhaust gases and evaporative emissions from motor vehicles, representing some 40 % of the present emissions of man-made VOCs to the atmosphere; whereas, at the time of adoption of that Directive, the Commission was r ...[+++]equested to submit a proposal for a Directive on the measures to reduce evaporation losses at every stage in the process of storage and distribution of motor fuels;

Whereas Community action must take account of environmental conditions in the various regions of the Community; whereas in this connection Member States must be able to uphold or impose more stringent measures relating to the evaporative losses from fixed installations throughout their territory or in geographical areas where it is established that such measures are necessary for the protection of human health or the environment because of special conditions;

The leak-tightness of the facepiece and the pressure drop on inspiration and, in the case of the filtering devices, purification capacity must be such as to keep contaminant penetration from a polluted atmosphere low enough not to be prejudicial to the health or hygiene of the user.

6.3.3. After completely evaporating the development solvent, place the plate for two to three minutes in an atmosphere of chlorine vapour, which is produced by pouring about 100 ml of hydrochloric acid (4.9) over about 2 g of potassium permanganate (4.8) in a closed vessel.