Chemtrail conspiracy theory

（重定向自Chemical trail）

A high-flying jet leaving a condensation trail (contrail)

Ballast barrels in a prototype Boeing 747. Photographs of flight test barrels are sometimes said to show chemtrail planes.

Contrails from propeller-driven aircraft engine exhaust, early 1940s

Chemtrails, according to the pseudoscientific chemtrail conspiracy theory, are long-lasting trails left in the sky by high-flying aircraft are chemical or biological agents deliberately sprayed for sinister purposes undisclosed to the general public. Believers in the theory argue that normal contrails dissipate relatively quickly, and contrails that do not dissipate must contain additional substances. These arguments have been dismissed by the scientific community: such trails are normal water-based contrails (condensation trails) that are routinely left by high-flying aircraft under certain atmospheric conditions. Although proponents have attempted to prove that the claimed chemical spraying does take place, their analyses have been flawed or based on misconceptions.

单词	Chemical trail
释义	Chemical trail 英语百科 Chemtrail conspiracy theory （重定向自Chemical trail） Chemtrails, according to the pseudoscientific chemtrail conspiracy theory, are long-lasting trails left in the sky by high-flying aircraft are chemical or biological agents deliberately sprayed for sinister purposes undisclosed to the general public. Believers in the theory argue that normal contrails dissipate relatively quickly, and contrails that do not dissipate must contain additional substances. These arguments have been dismissed by the scientific community: such trails are normal water-based contrails (condensation trails) that are routinely left by high-flying aircraft under certain atmospheric conditions. Although proponents have attempted to prove that the claimed chemical spraying does take place, their analyses have been flawed or based on misconceptions.
随便看	Gentiana cuneibarba Gentiana curvianthera Gentiana curviphylla Gentiana dahurica Gentiana dahurica Fisch. Gentiana damyonensis Gentiana daochengensis Gentiana davidii gentiana davidii formosana Gentiana davidii Franch. Gentiana decipiens Gentiana decorata Gentiana decumbens Gentiana decumbens L. Gentiana decumbens L.f. Gentiana delavayi Gentiana delicata Gentiana deltoidea Gentiana dendrologi Gentiana dendrologi Marq. Gentiana depressa Gentiana detonsa gentiana detonsas Gentiana divaricata Gentiana dolichocalyx