STY Azeemi, S.M. Raza:-  As Ghadiadi, Klotsche Corelated colors with chakras/ Red:- Roof Chakra, orange, sacral chakra, Green (Heart chakra), Blue (Throat chakra), Indigo (Brown chakra), Violet (Crown Chakra), white (perfect color blend). chromotherapy provide colors to the electromagnetic body or the aura(energy field) around the body, which in turn transfers energy to the physical body. This make chromotherapy the most effective among various therapies. 

U Berck , S. Sharma ( Ind  J Trad Knowl, 1(2015), p.p 63-68

Agnihotra is special fire performed exactly at the time of sunrise and sunset in a copper pyramid. It comes from ancient vedic knowledge. Agnihotra is said to purify the environment and specially it has been found to have prefound impact in mitigating water pollution problem.

Satya Prakash (KVRF) Publication calicut (2011):-

Chemistry in agnihotra play a major role in our day to day life. Therer are several historical evidence in the support of above data. Eg. of vedic period and bhraram period are famous for the organization of yaag.

trch oral Biol 56 (2011) pp. (650- 654) :- oral bacteria are known to produce many short chain fatty acids ( SCFAs, isobutyric, butyric, isovalenic, propionic, lactic acids) 4, 7,8 and even LCFAs (myristic acid, palmitic acid) as end products of their metabolism.

Cosmic energy A. Jirsch 2010:- Be happier, healthier and more passionate :- its carry when we  are attained to the pure power of the universe known as cosmic energy. Renowned psychic Anne Jirch teaches us  how to connect with this natural creative force and use it to transform our life.

P Bansal, R. Kaur, V. Gupta, S.Kumar, R. Kaur, J. Epilepsy Res, 5 (2015) pp. 33-45:- In older time Rishimuni ancient scholar and physicians used to recommend hawan for mental peace and well being . Gayatri Mantra also tells that Sughandhim (aroma, fragrance) pushtivardharam (gives rise to good wealth)om triambkum yajamahe, sughandhim pushtivardhanam, urvarukmev vandhanaat , mrityu mokshey mamritaat!

As per the author's knowledge, the latest reviews are not available on this topic and the given literature is sufficient to discuss this study. 

First of all all the above said articles are made completely pure (free from any impurity). Now fire is ignited with the help of Camphor. Now concerned Ved- mantras are repeated before each process.

SAMIDHA-

In India some specific wood pieces are used as samidha in yaag process as per Swami Dayanand are Chandan, Palas, Pipal, Bad, Gular, Aam etc. In England Oak wood is used as samidha. While in Afganistan badam wood is used as samidha. Main portion of wood in cellulose (C6H10O5)n. It also contain some fraction of gum, volatile oils, acids, fatty acids & some inorganic compounds. Percentage of oil in different woods are as under-

Table -1

while on the other hand the percentage compositions of  wood and coal are as under-

Table-2

thus on the basis of above data wood is preferred in place of coal in Yaag process. Since coal produce higher percentage of CO gas on combustion –

 2C(s) + O₂(g)                          2CO(g)

when combustion of wood take place during yaag then different useful chemical are produced which work against different disease eg.

Table-3

Thus the wood used as samidha are very useful against different diseases because they produce useful gases on combustion during Yaag process. Their chemical composition were discussed by Demok, Kertikar and chopola in detail.
SAMAGRI
As per Swami Dayanand samagri must contain following four properties -
1. They must have pleasant smelling chandan, Kasturi, Agar, Togar & Jayfal.
2. It must contain proper amount of the following eg. Ghee, Milk, Fruits, Rice,  Wheat etc.
3. It include some sweet items e.g; sugar, sahad, & chura etc.
4. It must some medicinal properties e.g; Geloy
Generally 1 Kg. Samagri must contain the following substances-
Table -4